In this paper, we present a systematic framework for recognizing human actions without relying on impractical assumptions, such as processing of an entire video or requiring a large look-ahead of frames to label an incoming video. As a secondary goal, we examine incremental learning as an overlooked obstruction to the implementation of reliable real-time recognition. Assuming weak appearance const...
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Effective display power management is essential to reduce the cost of operating desktop computers as well as prolonging the lifetime of battery-operated notebooks and laptops between consecutive battery recharges. Although displays are dedicated for our eyes, existing display power management technologies “sense” only our fingers or temperature or motion through keyboard, mouse, or special sensors...
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Statistical image modeling is of central importance to many image-processing tasks that are ill-posed in nature. Existing image models can be categorized as parametric models and nonparametric models according to the statistical techniques used. In this paper, we develop a hybrid image reconstruction (HIR) algorithm from sparse random samples using parametric and nonparametric modeling of images. ...
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Rate control plays an important role in video coding. However, in the conventional rate control algorithms, the number and position of macroblocks (MBs) inside one basic unit for rate control is inflexible and predetermined. The different characteristics of the MBs are not fully considered. Also, there is no overall optimization of the coding of basic units. This paper proposes a new region-based ...
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Nonlinear image warping or image resampling is a necessary step in many current and upcoming video applications, such as video retargeting, stereoscopic 3-D mapping, and multiview synthesis. The challenges for real-time resampling include not only image quality but also available energy and computational power of the employed device. In this paper, we employ an elliptical-weighted average (EWA) re...
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This paper focuses on the problem of structure and motion recovery from uncalibrated image sequences. It has been empirically proven that image measurement uncertainties can be modeled spatially and temporally by virtue of reprojection residuals. Consequently, a spatial-and-temporal-weighted factorization (STWF) algorithm is proposed to handle significant noise contained in the tracking data. This...
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Existing systems for 3-D reconstruction from multiple view video use controlled indoor environments with uniform illumination and backgrounds to allow accurate segmentation of dynamic foreground objects. In this paper, we present a portable system for 3-D reconstruction of dynamic outdoor scenes that require relatively large capture volumes with complex backgrounds and nonuniform illumination. Thi...
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This paper presents a novel algorithm for the removal of reflections generated by objects on reflecting floors. The algorithm uses both chromatic properties of the reflections and geometrical constraints on their positions; however, it does not make use of a model of the reflected objects, and so it can be applied to scenes containing several kinds of objects (e.g., people, baggage, animals, vehic...
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Wireless vision sensor networks (WVSNs) have a number of wireless vision sensor nodes (VSNs), often spread over a large geographical area. Each node has an image capturing unit, a battery or alternative energy source, a memory unit, a light source, a wireless link, and a processing unit. The challenges associated with WVSNs include low energy consumption, low bandwidth, limited memory, and process...
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Aims & Scope

IEEE Transactions on Circuits and Systems for Video Technology (TCSVT) covers the circuits and systems aspects of all video technologies. General, theoretical, and application-oriented papers with a circuits and systems perspective are encouraged for publication in TCSVT on or related to image/video acquisition, representation, presentation and display; processing, filtering and transforms; analysis and synthesis; learning and understanding; compression, transmission, communication and networking; storage, retrieval, indexing and search; and/or hardware and software design and implementation.